Your game kept my attention all the way to the end. I thought you did a great job with the puzzles - very "Rusty Lake". I could play this type of game all day. The inventory was a little confusing. I hard a hard time telling if the item was highlighted for use or if I was in fact doing anything with selected objects.
I found a small bug - when closing the book, I think the arrow to move right is still active, so when clicking to close the book I sometimes clicked the right arrow and was confusingly taken to the next room.